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GB492431A - Improvements in or relating to electric resistances or resistors - Google Patents

Improvements in or relating to electric resistances or resistors

Info

Publication number
GB492431A
GB492431A GB34261/37A GB3426137A GB492431A GB 492431 A GB492431 A GB 492431A GB 34261/37 A GB34261/37 A GB 34261/37A GB 3426137 A GB3426137 A GB 3426137A GB 492431 A GB492431 A GB 492431A
Authority
GB
United Kingdom
Prior art keywords
boride
joint
crystal
boron
lead wire
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB34261/37A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB492431A publication Critical patent/GB492431A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors

Landscapes

  • Measuring Volume Flow (AREA)
  • Thermistors And Varistors (AREA)

Abstract

492,431. Electric resistances. STANDARD TELEPHONES & CABLES, Ltd. Dec. 10, 1937, No. 34261. Convention date, Dec. 24, 1936. [Class 37] A resistor having a high negative temperature coefficient, comprises a granule consisting of a crystal or a cluster of boron crystals 11, permanently joined to lead wires 12, 13, for example of platinum, palladium or iron, by a compound of boron and the metal lead wire. The joint is formed by applying a pin-point flame to the point of contact between the lead wire and the boron crystal when a small mass of boride of the metal constituting the lead wire is formed and effects the joint. The boride is a good conductor and the resistance value of the resistor may therefore be fixed at any value by the area of contact between the boride joint and the crystal. The lead wires 12, 13 are welded or otherwise secured to supporting wires 14, 15 sealed into a protective glass tube 16 which may be exhausted or contain any suitable gas.
GB34261/37A 1936-12-24 1937-12-10 Improvements in or relating to electric resistances or resistors Expired GB492431A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US492431XA 1936-12-24 1936-12-24

Publications (1)

Publication Number Publication Date
GB492431A true GB492431A (en) 1938-09-20

Family

ID=21958796

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34261/37A Expired GB492431A (en) 1936-12-24 1937-12-10 Improvements in or relating to electric resistances or resistors

Country Status (1)

Country Link
GB (1) GB492431A (en)

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